问题描述
我正在寻找一个 ColdFusion 或 Java 正则表达式(用于替换函数)，它只匹配数字 [0-9]、字母 [az]，但不包含 ASCII 葡萄牙语 字母(unicode latin，如 ç 和 ã).
I'm looking for a ColdFusion or Java regex (to use in a replace function) that will only match numbers [0-9], letters [a-z], but include none ASCII Portuguese letters (unicode latin, like ç and ã).
有些是这样的:
str = reReplaceNoCase(str, "match none number/letter but keep unicode latin chars", "", "ALL");
输入字符串:informação 123 ?:#$%"期望的结果:informação 123"
我知道我可以用 [az][0-9] 匹配字母和数字，但这不匹配 ç 和 ã 等字母.
I know I can match letters and numbers with [a-z][0-9], but this doesn't match letters such as ç and ã.
推荐答案
试试字母数字字符类:w，它应该匹配字母、数字和下划线.
Try alphanumeric character class: w, it should match letters, digits, and underscores.
您也可以使用特殊的命名类 p{L}(我不知道，Java RegEx 解析器是否支持它).因此，在 C# 中，您的任务可以使用以下代码完成:
Also you can use special named class p{L} (I don't know, does Java RegEx parser support it).
So in C# your task can be done using following code:
var input = "informação 123 ?:#$%";
var result = Regex.Replace(input, @"[^p{L}s0-9]", string.Empty);
Regex [^p{L}s0-9] 表示:该类中的任何字符not(所有字母、空格、数字).因此它在您的示例 ?:#$% 中匹配，我们可以用空字符串替换这些字符.
Regex [^p{L}s0-9] means: any character not in this class (all letters, white space, digits). Thereby it matches in your example ?:#$% and we can replace these characters with empty string.
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